It may be hated, but it is a convention of most serialized literature, whether comic or any media. Probably to help audiences 'relate' and connect parts of the plot. But most of this stuff is also highly character driven to me.
No I don't like necessarily "it's all connected" but having seen in soaps, comics, etc, the appearance of the long lost, or never mentioned fill in _______, it really just works for the medium, it elicits interest etc. (shows how old he is) So when Dynasty's Krystal walks up to "Rock Hudson" and slaps his face (season 4 or whatever cliff-hanger) you want to find out why, and of course it's because Rock's character is her niece Sammie-Jo's father, who abandoned her and Krstyal's sister long before.
MOst people want that kind of thing. I kinda dig it myself. But I don't always like 'severe' retcons, which tend to be more about plotting, but also used to explain connections to characters. Severe retcons are when some characters are found to be not dead. So Bucky is a severe retcon, but handled well and plausibly, in my opinon. Professor X not really dying waaaaay back, '60s, but in hiding - does not work so well for me.